Invention Grant
- Patent Title: Stage tool for wellbore cementing
- Patent Title (中): 井筒固井用工具
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Application No.: US13501539Application Date: 2010-11-12
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Publication No.: US09121255B2Publication Date: 2015-09-01
- Inventor: Daniel Jon Themig , Christopher Denis Desranleau , James Fehr
- Applicant: Daniel Jon Themig , Christopher Denis Desranleau , James Fehr
- Applicant Address: CA Calgary
- Assignee: PACKERS PLUS ENERGY SERVICES INC.
- Current Assignee: PACKERS PLUS ENERGY SERVICES INC.
- Current Assignee Address: CA Calgary
- Agency: Bennett Jones LLP
- International Application: PCT/CA2010/001827 WO 20101112
- International Announcement: WO2011/057416 WO 20110519
- Main IPC: E21B33/13
- IPC: E21B33/13 ; E21B34/00 ; E21B43/00 ; E21B33/14 ; E21B21/10

Abstract:
A stage tool for wellbore annular cementing may be opened for cementing by hydraulic actuation of a sliding sleeve valve from over a fluid port. After sufficient cement has been introduced, the stage tool fluid port can be closed by compressing two telescopically arranged parts of its tubular body to further overlap each other and overlie the fluid port. This permits the stage tool to be closed without employing a plug.
Public/Granted literature
- US20120247767A1 STAGE TOOL FOR WELLBORE CEMENTING Public/Granted day:2012-10-04
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